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Published on: February 16, 2017
[Prevalence of hyperimmunization against tetanus and systematic adverse reactions to tetanus toxoid in children]
Leszek Szenborn1, Elzbieta Saraczyńska, Lucjan Ilnicki
1Katedra i Klinika Pediatrii i Chorób Infekcyjnych, Akademii Medycznej we Wrocławiu. szenborn@zak.am.wroc.pl
Insights
Children in Poland exhibit robust tetanus immunity, with very few experiencing adverse reactions to the tetanus vaccine. Antibody levels indicate strong protection, suggesting a low risk of severe side effects from tetanus toxoid immunization.
Area of Science:
- Immunology
- Vaccinology
Context:
- Systemic reactions to tetanus vaccine are rare, with adverse events potentially linked to excessive antibody titers.
- Understanding tetanus antibody concentrations is crucial for assessing the risk of post-vaccination side effects.
Purpose:
- To investigate tetanus antibody concentrations in children to define the risk of adverse reactions.
- To evaluate the relationship between tetanus toxoid antibody levels and potential side effects.
Summary:
- A study examined 190 children aged 7 and 14 years for tetanus antibody concentrations using commercial EIA.
- All participants demonstrated protective antibody levels (≥0.01 IU/ml), with higher concentrations observed in 14-year-olds compared to 7-year-olds.
- A small percentage (6.84%) had high antibody levels (>5 IU/ml), potentially increasing side effect risk if revaccinated within five years.
Impact:
- Tetanus immunity in Polish children is assessed as very good, indicating a low risk of severe side effects from tetanus vaccination.
- Findings suggest that current tetanus vaccination schedules provide effective and lasting immunity in the pediatric population.
Background And Aims:
during the last 30 years we have observed only two children (aged 6 and 3 years) with systemic reactions after tetanus vaccine, given unnecessarily 5 and 10 months after appropriate primary immunization. The adverse reactions after tetanic toxoid appear to be directly related to excessive titre of protecting antibodies. The aim of this paper is to investigate the concentration of tetanus antibodies, which may help to define the risk of adverse reactions.
Methods:
tests were carried out in 190 children (86 male, 104 female) aged 7 (n=95) and 14 (n=95) years. Antibodies to tetanus toxoid were determined using a commercial EIA.
Results:
all examined children had protective concentration of tetanus antibodies (above 0.01 IU/ml; range from 0.1 to 6.0 IU/mL). There were significant differences between antibodies concentrations (GMC) in children aged 7 and 14 years (0.93 vs. 1,76 IU/ml; p=0.048). The antibodies concentrations above 1 IU/ml which indicate long term protection were more frequently observed in children aged 14 than those aged 7 years (73 vs. 59%; not statistically significant). Only 6.84% of all examined children (n=190) had high antibodies concentration above 5 IU/ml, which could increase the risk of side effects if the next booster would be given during the next 5 years.
Conclusions:
children in Poland are only slightly exposed to risk of severe side effects after vaccination against tetanus. The tetanus immunity in examined children can be assessed as very good.
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Hypersensitivity Reactions: Delayed Hypersensitivity Reactions
